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Ct Review Class > Ch. 6 Ct Exam And Anatomy Part. 1 > Flashcards

Ch. 6 Ct Exam And Anatomy Part. 1 Flashcards

1
Q

Indications Ct exam of the head p 7

A

Trauma, stroke, headache, tumors, endocrine disease, inflammatory disease, and congenital problems

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2
Q

Ct exam head _____ slices always required p 7

A

Transverse

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3
Q

Ct exam of head requires coronal and sagital slices for p 7

A

Internal auditory canals, temporal bones , pituitary, orbits, sinuses and facial bones

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4
Q

Ct of head patient enter gantry p 7

A

Head first supine

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5
Q

Two ways obtaining coronal images of head p 7

A

Patient supine and head first Hyperextended patien head and top gantry tilted 20 degrees

Patient prone and head first resting on chin and gantry tilted back 20 degrees

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6
Q

Localizer of head ct is what image? P 7

A

Lateral

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7
Q

Iv contrast for head ct administered ? P 8

A

Highlight vascular structures of the brain to indicate a disruption of the blood brain barrier

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8
Q

Ct exam of brain patient entered gantry p 9

A

Head first and supine

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9
Q

Contrast media not admixtures for exam of brain p9

A

Cerebral trauma
Suspected atrophy
Hydrocephalus
Dementia

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10
Q

Contrast administered for ct of brain p 9

A 
Tumors
Abscesses
Edema
Aneurysm
Headaches and seizures
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11
Q

Axial slices of brain acquired from the ______ to _____. P 9

A

Skull base

Vertex

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12
Q

Typical brain slice thickness reconstruction p 9

A

5mm slices

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13
Q

Why thinner slices on ct of brain? P 9

A

Reduce streaks scanning through posterior fossa and pretrous ridges

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14
Q

Routine brain scan technique p 10

A

300 ma kvp 120

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15
Q

Bone window level of head p 11

A

Width: 2500

Level - 350

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16
Q

Posterior fossa window width and level p 11

A

Width: 200

Level: 40

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17
Q

Soft tissue of head window width and level p 11

A

Width: 100

Level: 30

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18
Q

Ct posterior fossa scan ( skull base) p 16

A

Head first supine scan

Axial slices only

From foramen magnum through the tentorium

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19
Q

Posterior fossa scan no contrast medium p 16

A

Cerebral trauma
Suspected atrophy
Hydrocephalus
Dementia

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20
Q

Posterior fossa scan contrast administered p 16

A 
Tumors
Abscesses
Edema
Aneurysms
Headaches
Seizures
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21
Q

Posterior fossa scan slice thickness p 16

A

1.5-5mm

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22
Q

Mas for posterior fossa scan p17

A

300-400 mas

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23
Q

Posterior fossa bone detail ww/wl

A

2500 ww and 350 wl

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24
Q

Posterior fossa soft tissue window p 16

A

Ww 160 and wl 40

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25
Q

I nternal auditory canal / temporal bones contrast exam p 18

A

Hearing loss to,rule out acoustic neuroma and malignant Ottis externa

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26
Q

I nternal auditory canal / temporal bones without contrast p 18

A

Depict temporal bone , mastoiditis, and cholestatoma

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27
Q

Instructions for study of I nternal auditory canal / temporal bones p 18

A

No swallowing

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28
Q

Slices thickness of I nternal auditory canal / temporal bones

A

0.5-2mm

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29
Q

I nternal auditory canal / temporal bones exam covers from? P 18

A

1cm inferior external auditory canal and superiorly petrous bone

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30
Q

Mas used for I nternal auditory canal / temporal bones p 19

A

200-400 mas

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31
Q

I nternal auditory canal / temporal bones technique

A

200-400 mas

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32
Q

I nternal auditory canal / temporal bones standard filter vs sharp filter p 19

A

Standard - soft tissue

Sharp - High resolution

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33
Q

I nternal auditory canal / temporal bones soft tissue window p 20

A

Ww- 200, wl- 50

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34
Q

I nternal auditory canal / temporal bones sharp algorithmn p 20

A

Ww- 2500

wl-300

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35
Q

Pituitary exam p 22

A

Head first and supine

Both axial and coronal

Contrast always administered

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36
Q

Pituitary exam _____ provide more information because _____ exam causes streak artifacts from dense bone of sella turcica

A

Coronal

Axial

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37
Q

Pituitary slice thickness p 22

A

0.5-2mm

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38
Q

Pituitary axial slices show p 22

A

Roof of sphenoid sinus through dorsum sella

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39
Q

Pituitary Coronal slices show p 22

A

Anterior clinoid process to dorsum sella

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40
Q

Pituitary exam mas p 23

A

200-400 mas

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41
Q

Pituitary soft tissue ww/wl p22

A

Ww-200

Wl-50

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42
Q

Pituitary sharp algorithmn ww/wl p 23

A

Ww-2500

Wl- 300

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43
Q

Orbit exam p 24

A

Axial and coronal images acquired

Head first and supine

Patient instructed to focus eyes on one thing or close them

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44
Q

No contrast media orbit exam p 24

A

Trauma, foreign bodies, Graves’ disease

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45
Q

Contrast for orbit exam p 25

A

Suspected mass in or around eye , visual disturbances, evaluating infection

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46
Q

Orbit exam slice thickness p 24

A

2mm or less

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47
Q

Axial images of orbits from p 24

A

Top maxillary sinus to upper orbital rim

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48
Q

Coronal slices orbit exam p 24

A

Sphenoid sinus to anterior globe

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49
Q

_______ images of orbits best demonstrate the relationship between the lens and intraorbital optic nerve

A

Transverse

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50
Q

Orbit exam mas p 26

A

200

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51
Q

Orbit soft tissue ww/wl p 26

A

Ww-200

Wl- 50

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52
Q

Orbit sharp algorithmn p 26

A

Ww- 2500

Wl- 300

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53
Q

Sinuses exam p 29

A

Both axial and coronal slices

Head first and supine

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54
Q

Contrast for sinuses p 29

A

Suspected mass such as lymphoma or inverted papilloma

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55
Q

No contrast for sinus exam p 29

A

Sinusitis

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56
Q

Sinus exam slices p 29

A

3 mm or less

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57
Q

Sinus axial exam from p 29

A

Hard palate through superior aspect frontal sinus

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58
Q

Coronal slices for sinus exam p

A

Dorsum sella to anterior aspect of frontal sinuses

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59
Q

Sinus exam mas p 30

A

200 mas

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60
Q

Sinus soft tissue p 30

A

Ww- 250

Wl- 50

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61
Q

Sharp algorithmn sinus p 31

A

Ww- 2000

Wl- 300

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62
Q

Facial bone exam p 34

A

Axial or coronal slices

Supine and head first

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63
Q

Why no contrast facial bone exam ? P 34

A

Head trauma

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64
Q

Facial bone slice thickness

65
Q

Facial bone scan coverage ? P 34

A

Hard palate through superior aspects of cranium

66
Q

Facial bone mas p 34

67
Q

Facial bone soft tissue ww/wl p 34

A

Ww- 300

Wl- 50

68
Q

Facial bone sharp algorithmn ww/wl p 34

A

Ww- 2500

Wl- 300

69
Q

Tmj scan p 38

A

Supine head first

Always oblique sagittal scan -

70
Q

Tmj scan done for

A

Fracture or bony erosion

71
Q

Tmj slice thickness p 38

72
Q

Tmj mas

73
Q

Tmj bone ww/wl

A

Ww- 2500

Wl- 350

74
Q

Tmj soft tissue window

A

Ww- 180

Wl- 40

75
Q

Cta is commonly used to evaluate

A

Intercranial aneurysms and vascular occlusion

76
Q

Cta of brain p 42

A

Head first and supine

100 ml contrast at rate 4-4.5 ml/sec

Scan 24 secs after start of injection

77
Q

Cta of brain scan from

A

C2- three quarters of brain

78
Q

Cta brain technique

A

120 kvp at 250 mas

79
Q

Ct brain perfusion done for ?p 44

A

Assessment of tissue viability and function after stroke

80
Q

Size gauge needle used for ct brain percussion

A

Large 16 or 18

81
Q

Ct perfusion contrast flow rate ? P 46

A

5-8 ml/ sec

82
Q

Ct brain perfusion slice thickness p 46

83
Q

Ct neck used for p 48

A

Eval tumors, inflammation, or infection, developmental anaomolies

84
Q

Why contrast in ct neck? P 48

A

Differentiate boodvessels and vascular tumors from lymph nodes

85
Q

Ct exam neck p 49

A

Head first supine

Axial slices

Patient instructed stop breathing or refrain swallowing

86
Q

Ct neck row rate

A

100 ml injected at rate of 3ml/sec with 35 sec delay

87
Q

Ct neck slice thickness

88
Q

Ct neck technique

A

120kvp

120 mas

89
Q

Ct larynx p 53

A

Head first and supine

Phonate “e” to evaluate vocal chord

90
Q

Ct larynx flor rate

A

100 ml /s rate 3ml per sec with delay 35 sec

91
Q

Ct larynx slice thickness

92
Q

Ct larynx ww/wl

A

Ww-300

Wl- 40

93
Q

Cta neck p 55

A

Head first and supine

Shoulders depressed

94
Q

Cta neck injection p 55

A

100 ml at rate 4-4.5 ml/ sec with iv in arm opposite of suspected occlusion with 15 sec delay

95
Q

Cta scan through p 55

A

From aortic arch through sella turcica

96
Q

Cta exam technique p55

A

120 kvp at 200 mas

97
Q

Cta neck best shows ? P 55

A

Carotid artery stenosis

98
Q

Why ct of the spine ? P 57

A 
Trauma
Intraspinal tumors
Disc herniation
Spinal infection
Spinal stenosis
Metastic disease fractures
99
Q

Lateral localizer images for spine allows p 58

A

Angle slices through each disc space

100
Q

Ap localizer on the spine allows p 58

A

Guarantees patient spine is straight and allows us to count ribs to locate thoracic spine

101
Q

Why iv contrast of spine ? P 58

A

Mass is suspected or for evaluation of post surgical spine

102
Q

Ct cervical spine p 59

A

Head first and supine

Patient refrain from swallowing due to motion

Depress patient shoulders avoid beam hardening artifact

103
Q

Ct cervical contrast used? P 59

A

Suspected mass

104
Q

Ct cervical slice thickness p 59

A

2mm overlapping slices

105
Q

Standard ct cervical ww/wl p 59

A

Ww- 300

Wl- 40

106
Q

Ct cervical sharp ww/wl p 62

A

Ww- 2000

Wl- 300

107
Q

Ct of T spine p 63

A

Supine head first

108
Q

Ct of t spine when use contrast? P 63

A

Suspected mass

109
Q

Ct of t spine slice thickness p 63

110
Q

T spine standard ww/wl p 64

A

Ww- 300

Wl- 40

111
Q

T spine sharp ww/wl p 64

A

Ww- 2000

Wl- 300

112
Q

Ct of L spine p 68

A

Head first and supine

Wedge under patient legs reduce lordatic curve

113
Q

Ct of L spine contrast when? P 68

A

Suspected mass

Differentiate scar tissue from recurrent disc disease in post surgical spine

114
Q

Ct of L spine slice thickness p 68

A

2-3 mm slices

115
Q

Ct L spine standard ww/wl p 70

A

Ww- 300

Wl- 40

116
Q

Ct of L spine sharp ww/wl p 70

A

Ww- 2000

Wl - 300

117
Q

Ct myelogram p 73

A

Contrast introduced into fluid space around spinal chord( subarchnoid space) under Fluor

118
Q

Why ct myelogram p 73

A

Spinal Chord

Nerve roots

Meninges

Assist pre op planning

119
Q

Ct discogram p 73

A

Contrast agent directly into suspect pain generating dicsc under Fluro

120
Q

Why discogram p 73

A

Planning for surgery whether do discectomy or fusion

121
Q

Ct myelogram/ discogram positioning p 73

A

Supine head first

Head slightly elevated to reduce headache or seizure from contrast

122
Q

Ct myelogram/ discogram slice thickness p 74

A

2-3 mm slices

123
Q

Ct myelogram/ discogram standard ww/wl p 75

A

Ww- 300

Wl- 40

124
Q

Ct myelogram/ discogram sharp algorithmn p 75

A

Ww- 2000

Wl- 300

125
Q

Musculoskeletal ct indications p 76

A

Lesions
Trauma
Joint spaces

126
Q

Musculoskeletal contrast evals for? P 76

A

Vascularity of tumors

Demonstrate major arteries or veins

127
Q

Shoulder ct p 78

A

Head first supine

External or internal rotation

Opposite arm raised

128
Q

Ct shoulder area of interest p 78

A

Clavicle through humeral head

129
Q

Shoulder ct slice thickness p 78

130
Q

Ct shoulder technique p 78

131
Q

Ct shoulder when contrast is used ? P 78

A

Post arthrogram

132
Q

Elbow ct p 81

A

Patient supine arm raised palm up

133
Q

Ct elbow slice thickness p 81

A

0.5-3mm slices

134
Q

Ct elbow soft tissue setting p 83

A

Ww- 400

Wl- 20

135
Q

Ct elbow bone setting p 83

A

Ww- 2000

Wl- 350

136
Q

Ct wrist p 84

A

Head first or supine arm out above head

137
Q

Ct wrist slice thickness p 84

138
Q

Ct wrist soft tissue setting p 85

A

Ww- 400

Wl- 20

139
Q

Ct wrist bone setting p 85

A

Ww- 2000

Wl- 350

140
Q

Ct hips p 86

A

Head first or feet first

Toes 15 degree inward

141
Q

Ct hip slice thickness p 86

142
Q

Ct hip mas p 86

A

200-300 mas

143
Q

Ct hip soft tissue p 87

A

Ww- 400

Wl- 20

144
Q

Ct hip bone setting p 88

A

Ww- 2000

Wl- 350

145
Q

Ct knee p 88

A

Feet first or supine with both knees symmetrical to long axis of patient table

If one knee only , center it on table

146
Q

Ct knee slice thickness p 88

147
Q

Ct knee mas p 88

148
Q

Ct knee soft tissue setting p 89

A

Ww- 400

Wl- 20

149
Q

Ct knee bone setting p 89

A

Ww- 2000

Wl- 350

150
Q

Ct ankle/ foot p 90

A

Feet first and supine

Foot- flat on table

Ankle - legs straight and flexed naturally

151
Q

Ct ankle/ foot slice thickness p 90

152
Q

Ct ankle / foot mas p 90

A

75-200 mas

153
Q

Ct ankle / foot soft tissue setting p 91

A

Ww- 400

Wl- 20

154
Q

Ct ankle / foot bone setting p 91

A

Ww- 2000

Wl- 350

155
Q

Ct runoff area of interest p 94

A

Upper abdomen to below ankles

156
Q

Ct runoff p 96

A

Feet first and supine

157
Q

Ct runoff contrast p 96

A

125 ml injected 4 ml/sec with delay 3 mins post injection

158
Q

Ct runoff technique p 96

A

120 kvp 200 mas

Ct Review Class (7 decks)

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